.sphere {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle at top left, rgb(255, 140, 0), rgb(223, 223, 59), rgb(128, 225, 128), rgb(116, 187, 213), rgb(202, 166, 234));
    margin: 50px auto;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}